Kristi Finney-Dunn, whose son was killed in SE Portland, pictured in 2016 on Stark Street advocating for safer pedestrian crossings and lower speed limits (Courtesy of PBOT) Portland approved an emergency plan Wednesday to reduce by 5 mph the speed limit on a more than 50-block stretch of Stark Street in Southeast Portland. Two of the city’s 10 traffic fatalities this year happened between 109th and 162nd avenues on Stark. A 53-year-old pedestrian was struck and killed on Feb. 1, and a 34-year-old motorist died Feb. 11. Leah Treat, Portland’s transportation director, on Wednesday told the City Council the bureau will install three new pedestrian crossings on Stark this year…